mirror
/
vk3cpu
kopia lustrzana https://github.com/miguelvaca/vk3cpu
1
0
Forkuj 0
Kod Zgłoszenia Packages Projekty Wydania Wiki Aktywność

Updated formula used to calculate Q

pull/2/head
miguel 2021-09-16 14:22:41 +10:00
rodzic 2edc6468fb
commit 39b33e2ecf
2 zmienionych plików z 7 dodań i 6 usunięć
Pokaż statystyki Ściągnij plik aktualizacji Ściągnij plik porównania Expand all files Collapse all files

BIN
MagloopQ.png
Wyświetl plik

Plik binarny nie jest wyświetlany.
Side by Side Swipe Nakładka

Przed

Szerokość:  |  Wysokość:  |  Rozmiar: 2.5 KiB

Po

Szerokość:  |  Wysokość:  |  Rozmiar: 3.1 KiB

13
magloop.html
Wyświetl plik

@ -7,7 +7,7 @@
<link rel="stylesheet" href="magloop.css"> <link rel="stylesheet" href="magloop.css">
</head> </head>
<body> <body>
<header>Miguel <a href="mailto:vk3cpu@gmail.com">VK3CPU</a> - Magloop Antenna Calculator V3</header> <header>Miguel <a href="mailto:vk3cpu@gmail.com">VK3CPU</a> - Magloop Antenna Calculator V4</header>
<section class="gridLayoutClass"> <section class="gridLayoutClass">
<div class="chart-container" style="position: relative;"> <div class="chart-container" style="position: relative;">
<canvas id="chartCanvas" class="chartCanvasClass"> <canvas id="chartCanvas" class="chartCanvasClass">
@ -65,8 +65,7 @@
</canvas> </canvas>
</div> </div>
<div class="notes"> <div class="notes">
<b><u>Notes:</u></b><br> <b><u>Notes:</u></b><br> The Magloop Antenna Calculator was developed to predict the characteristics of a small-loop (aka "magnetic loop" or "magloop")
The Magloop Antenna Calculator was developed to predict the characteristics of a small-loop (aka "magnetic loop" or "magloop")
antenna, given physical dimensions entered via slider widgets. It assumes the main loop is made from a round antenna, given physical dimensions entered via slider widgets. It assumes the main loop is made from a round
anodised copper or aluminium conductor. I developed this multi-turn capable magloop calculator to take advantage of the anodised copper or aluminium conductor. I developed this multi-turn capable magloop calculator to take advantage of the
touch-screens and high-speed of modern mobile phones, to allow users to get realtime feedback of the predicted touch-screens and high-speed of modern mobile phones, to allow users to get realtime feedback of the predicted
@ -112,6 +111,8 @@
<img src="I_loop.png" alt="magloop antenna loop current"><br> <img src="I_loop.png" alt="magloop antenna loop current"><br>
<br> <br>
<b><u>Change history:</u></b><br> <b><u>Change history:</u></b><br>
[16-Sep-21] : Updated equation used for Q to match the one use in the ARRL Antenna Book. Changed to V4. This will affect predictions for V_cap, I_loop and BW. Based on reading
"Impedance, Bandwidth, and Q of Antennas" by A D Yaghjian, IEEE Transactions on Antennas and Propagation, April 2005.<br>
[16-Sep-21] : Added equation graphics for V_cap and I_loop formulas.<br> [16-Sep-21] : Added equation graphics for V_cap and I_loop formulas.<br>
[12-Sep-21] : Set maximum values to Q, Vcap and I axes to stop autoscaling. Max Q set to 2000, Vcap to 20 kV and I to 100 A.<br> [12-Sep-21] : Set maximum values to Q, Vcap and I axes to stop autoscaling. Max Q set to 2000, Vcap to 20 kV and I to 100 A.<br>
[12-Sep-21] : Added formula/equation graphics in Notes section. A few more complex ones, such as effective capacitance and SRF, are still needed.<br> [12-Sep-21] : Added formula/equation graphics in Notes section. A few more complex ones, such as effective capacitance and SRF, are still needed.<br>
@ -344,7 +345,7 @@
const Xl = inductiveReactance(frequency); const Xl = inductiveReactance(frequency);
const Rl = lossResistance(frequency); const Rl = lossResistance(frequency);
const Rr = radiationResistance(frequency); const Rr = radiationResistance(frequency);
const Q = Xl / (Rl + Rr); const Q = Xl / (2.0 * (Rl + Rr));
return Q; return Q;
} }
@ -1020,7 +1021,7 @@
}, },
ticks: { ticks: {
beginAtZero: true, beginAtZero: true,
max: 20.0, max: 10.0,
}, },
min: 0.0, min: 0.0,
position: 'left', position: 'left',
@ -1075,7 +1076,7 @@
}, },
ticks: { ticks: {
beginAtZero: true, beginAtZero: true,
max: 3000.0, max: 1800.0,
}, },
position: 'right', position: 'right',
id: 'qID' id: 'qID'